experiment3_kcl & kvl

8/12/2019 Experiment3_kcl & Kvl

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ASCT/EEE/LAB/BEE-03

(Kirch-hoffs Current & Voltage La!

EXPERIMENT NO. - 03

AIM: Verification of Kirch-hoffs Crrent !a" #KC!$ % Kirch-hoffs Vo&ta'e !a"

#KV!$.

IN(TR)MENT( RE*)IRE+:S. No. Name Range Qty

1. "egulate# $oer su$$l% 0 -30V

' "heostat )00 oh*+ a*$

3 "heostat ,) oh*+ ) a*$

, "heostat ) oh*+) a*$ '

) A**eter 0- a*$ '

A**eter 0-' a*$

. Volt*eter 0-)0V

Volt*eter 0-30V

T,EOR:Kirch-hoffs Current Law (KCL):

Kirch-hoffs current law states that the algebraic sum of the all branch

current leaving a node is zero at all instants of time.

This la is a conseuence of conser1ation of charge2 hich enters the no#e2

*ust lea1e the no#e since it cannot e store# there Since the algeraic su* of the

charge is 4ero So its ti*e #eri1ati1e shoul# also e 4ero

A node in a network is the point at which more than two branches are meeting

together.

5athe*aticall%2

I/I 1 I3/I2

Kirch-hoffs o!tage Law (KL):

Kirch-hoffs voltage law state that the algebraic sum of the all branch voltage

around any closed lop a network is zero at all instants of time.

This la is a conseuence of the la of conser1ation of energ%2 1oltage eingthe energ% $er unit charge An increase in energ% hile going fro* one ranch to

another is ter*e# as a 1oltage rise hile a #ecrease in energ% is ter*e# as a 1oltage

#ro$

Alternatel%2 the Kirch-hoffs 1oltage la *a% e e6$resse# in ter*s of #ro$ &

rise of 1oltage as7Around any closed loop at any instant of time, the sum of voltage

drop must be equal to the sum of voltage rise.

5athe*aticall%2

e..f. / IR 1 0

V 1 IR/ IR3V1 V/ V3

8age of 3


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ASCT/EEE/LAB/BEE-03


CIRC)IT +IA4RAM:

PROCE+)RE:": Kirch-hoffs Current Law:

Connect the circuit as $er the fig

' A#9ust the $osition of all the rheostats in the circuits so that each of these offers

*a6i*u* resistance in the eginning

3 Sitch on the #c su$$l%

, :ote #on the rea#ings of all the a**eters in the circuit

) Change the 1alue of resistances in the ranches to get #ifferent set of rea#ings

;hile ta


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ASCT/EEE/LAB/BEE-03


O5(ERVATION TA5!E:

": Kirch-hoffs Current Law:

S. No. "$$!ie% &o!tage ' '1 ' '1 '

'

#: Kirch-hoffs o!tage Law:

S. No. "$$!ie% &o!tage 1 1

'

RE()!T: Since the current entering the netor< = is eual to the su**ation of the

current lea1ing the netor< ie => ='2 therefore the Kirch-hoffs Current La

is 1erifie#

' Since the algeraic su* of all 1oltages ie V& V'aroun# a close# loo$ is

eual to V Thus Kirch-hoffs Voltage La is 1erifie#

PRECA)TION(:

5a

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